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Confusion with exam objective

Andy James
Ranch Hand

Joined: Aug 22, 2005
Posts: 90
I am preparing for the OCP Java7 certification. I am unable to understand the following exam objective:

"Apply object composition principles"

Can anyone please help explain this objective. Are there multiple composition principles or just one - define a variable of type A in type B, if you want to use the functionality of A in B, rather than maling type B inherit type A?

cheers
Andy
Andy James
Ranch Hand

Joined: Aug 22, 2005
Posts: 90
Can anyone please answer to this query?

Andy
 
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subject: Confusion with exam objective
 
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